Thomas butlee ashfoed



(No Model.) I

T. B. ASHPORD.

. INDIUATOR LOCK. No. 307,254. Patented Oct. 28, 1884.

INVENTOR: Q. C/[a/ ATTORNEYS.

THOMAS BUTLER ASHFOBD, OF CLINTON, NORTH CAROLINA, ASSIGNOR TO BIASUNDERVVOOD, OF SAME PLACE.

INDICATOR-LOCK.

SPECIFICATION forming part of Letters Patent No. 307,254, dated October28, 1884.

Application filed June .2, 1884. (N model.)

To all whom, it may concern: rel-key fitting upon the key-pin k. To theBe it known that I, THOMAS B. ASHFORD, bolt, however, is pivoted aspring-pawl, H, of Clinton, in the county of Sampson and State whichengages with the ratchet-wheel G, and of North Carolina, have inventedcertain'new which ratchet-wheel is provided also with a and usefulImprovements in Indicator-Locks, spring-detent, I; so that as theboltmoves back of which the following is a description. in unlocking theshackle-bar this spring-pawl Figure 1 is a front view, and Fig. 2 a rearcatches into the teeth of the ratchet-wheel and view, of the lock. Fig.3 is an interior view turnsthe. latterthe distance ofonetooth. Then fromthe front with theiace-plate turned back as the bolt moves back to lockthe shackle- IO on its pivot. Fig. 4 is an edge view in secbar thedetentlholds the ratchet-wheel while tion through the line m 00 ofFig. 1. Fig. 5 is the pawl H is moving back to secure a new a sectionalview of the case through the line position on the wheel. On the backside of y 3 of Fig. 3. the ratchet-wheel Gthere is a series offigures Myinvention relates to that class of locks arranged in a circular row,which series ot'fig- 15 known as indieatonlocks, the object being u resshow one by one through an opening, 0, to prevent the lock from beingopened and in the back of the case, as in Fig. 2, and which then closed.again by an unauthorized person, figure changes with each movement ofthe to which end an indicator-wheel is set to show ratchet-wheel until acomplete revolution has a different number each time the lock is beenmade. Now, to prevent the lock from 20 opened, and which change in thenumbers, being repeatedly locked and unlocked untila showing through anopening in the lock, gives complete revolution has been made, and thenproof of the surreptitious opening of the lock. reset upon the samenumber, a projection, (Z,

My invention consists in the peculiar conis attached to theratchet-wheel, and I form struction and arrangement of the farts of theholes in in through the face-plate and case, and

2 5 look, as hereinafter fully described. through themis placed theshackle'wire a of a In the drawings, A represents the case of metallicseal. Now, when the projection (Z the lock, which may be of anydesirable form, comes around to the shackle-wire of the seal, and B isthe face-plate,which is connected to the latter acts as a stop toprevent any further the'lock-case, as follows: The bolt which seprogresswithout breaking the wire. This 0 cures the shackle-bar C also passesthrough and seal may be put in place by the railroad comforms a hinge orpivotal joint for the face pany, and kept there until the ratchet-wheel,plate at I). Then at the lower portion of the by successive legitimateopenings and closlock-case is attached an upwardly-projecting ings, hasshown all its numbers, and then a new fiangeor lip, c, beneath which thelower edge seal is to be put in place. As a still further 5 of thefaceplate B passes when closed down precaution, I place a spring, 0,against the over the lock-case. Then to hold the face back of the case,which spring has one or more plate down to this position said face-plateis sharp points adapted to enter a hole, 0", in the provided at thepoint where the shackle-bar case and over which hole is placed a pieceof enters the case with a perforated flange, a, paper, 0. Then on theratchet-wheel is ar- 0 resting upon fiangeb outside the case, throughranged a lug, Z, and when the ratchet-wheel 0 which flange c the shacklebar passes, and makes a complete revolution the lug Zpresses through theslot in which shackle bar the upon the spring 0 and forces the points ofthe bolt E passes, and by which construction the latter through a pieceof paper, 1), thus leavface-plate is firmly held to the case of the looking evidence of the complete revolution of the .5 whenever the latter islocked or closed, and wheel, so that even if the wheel be reset on 5thus the bolt holds the shacklebar, and the the same number thesurreptitious opening of shackle-bar holds the face-plate against beingthe lock can be detected.

pulled out or turned on its pivot. To hold the ratchet-wheel against theback The tumbler F and bolt E of the lock are of of the case, a washer,g, rests between it and 50 the usual pattern, and are operated by abarthe faceplate. roo

Having thus described my invention, what I claim as new is 1. Thecombination of the loeleease having flange c, the shackle-bar C, theface-plate B, hinged upon the fulcrum-pin of the shacklebar, and havinga perforated flange, 0, outside of the case, and the bolt adapted tolock the shackle-bar and hold the faceplate, as described.

2. The combination, with the loek-easehaving opening 0 and the belt, ofa pawl attached to the bolt, a ratchet-wheel, G, having lug 7, andprovided with numbers 011 its rear side, and the spring (1, having apoint adapted to be

